Working of MPFI engine :- The MPFI is an advanced version of carburetor engine. As we said earlier that the MPFI engine is having a fuel injector for each cylinder. A computer is used to control each and every fuel injector individually. The computerized system of the car consists of a microcontroller. This microcontroller monitors each fuel injectors and keeps on telling each injector about the amount of fuel to be injected to the cylinder so that the fuel wastage can be reduced. Since there is a controlled fuel usage, the engine is known for its fuel efficiency. Even though the working of MPFI engine is somewhat similar to the carburetor engine, each cylinder is treated individually. An input is fed to the computerized system inorder to calculate the amount of air and fuel is to be mixed and send to the combustion chamber. A several stages of calculations are to be made in order to judge the right amount of fuel to be mixed. After this calculation, the proper fuel is delivered at the proper instance. There are a number of sensors used in the MPFI engine. At the time when the inputs are given to the cars computer, it begins to read the given sensors. The things which can be known from the sensors are listed below:- The engine temperature of the vehicle. The speed at which the engine is running. The engine load. The position of the accelerator. The cylinders air-fuel pressure. The rate of exhaust. The amount of fuel to be injected into the combustion chamber is decided by analyzing the inputs given to the computerized system of the MPFI engine. In modern MPFI engines, a memory unit is additionally installed. This will make the MPFI engine capable of storing the user settings so that it can operate easily. The driving habits of a driver can also be detected by this system so that the MPFI system itself can change the predefined settings which suit the user. There are namely two types of MPFI engines namely:- 1.Sequential 2.Simultaneous Thus it can be noted that the cars of today are truly intelligent. Advantages of MPFI:- The advantages of MPFI engine are as follows: Each cylinder or the air-fuel mixing chamber is supplied with the precise and uniform quantity of the air-fuel mixture. Engine crank is not necessary in cold climatic conditions. Good engine response to the throttle applied. Accurate supply of the air-fuel mixture. ECM technique is used to control the engine. High fuel efficiency or mileage. ^_^ If Any questions can ask OK :)
Posted on: Fri, 26 Dec 2014 14:35:25 +0000
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